if you feel the need to prove god's existence you don't really believe in him. you question his existence, you try to figure if it's a lie or the truth, people that truly believe god exist don't come up with proofs and reasons, they don't need to. for them there is no question to answer, there is no debate or argument. you are insecure about your own beliefs, and that is why they are so weak.To paraphrase Mulla Sadra's Logical Proof for God
1) There is a being
2) This being is a perfection beyond all perfection
3) God is Perfect and Perfection in existence
4) Existence is a singular and simple reality
5) That singular reality is graded in intensity in a scale of perfection
6) That scale must have a limit point, a point of greatest intensity and of greatest existence
7) Therefore God exists